Officials said family members found the unidentified minor under water in a pool just before 6 p.m.
Authorities say a pedestrian was listed in grave condition at a hospital after being struck by a car in Riverside.
The incident occurred near the 2100 block of South Ocean Front Walk.
A police officer remained in critical condition Saturday after undergoing neurosurgery following a shooting that killed a suspect in San Bernardino.
The child was transported to a nearby hospital where he was reported dead.
A fisherman in his 50s was believed to be in grave condition after being pulled from the water in San Pedro.
Glendale Police Thursday continued to hunt for a hit-and-run driver who left a 75-year-old woman in grave condition.
A man was repeatedly stabbed Wednesday after getting into an argument with an acquaintance in Moreno Valley.
Authorities said Saturday two teens are in grave condition following a house fire in Sylmar.
A resident was pulled in grave condition from an apartment fire in North Hollywood Wednesday night, authorities reported.
A father was critically injured and his daughter killed Saturday when a car plowed into them at a bus stop in Orange.
Authorities say a man working on his car is in grave condition after the vehicle collapsed on top of him.
A woman is in critical condition Monday night after her car was hit by a truck near a gas station in Anaheim.
A police chase of a woman suspected of firing gunshots during an argument in Hollywood has ended with the woman shooting herself.
A year-old child is in grave condition after being pulled unconscious from a backyard pool in Moreno Valley Thursday afternoon.